Check out this new moto cross course in Cardiff.
I don't for one minute think this is either the biggest or the best in the UK-I'm sure there are many like it, and it would be good to hear about them.
What I especially like though is that this is a partnership, and a commercial activity has come about through concerns about youths on motorbikes. Like I'm sure is the case in all big cities, Cardiff suffers from this, especially on the peripheral estates, and this new centre gives the opportunity of training and volunteering as a payment method for using it. Read the history section, its interesting!
It'd be good to hear about other schemes around the country.
cheers
http://www.cmxcentre.co.uk/